If you live in Temple, Belton, Killeen, or anywhere in Central Texas, your attic is the single biggest factor in how comfortable your home feels and how much you spend on electricity. The Texas sun beats down on your roof for 8 to 10 hours a day in summer, and without the right insulation, all that heat pushes straight into your living space.
But "insulation" is not one thing. There are several types, and each one works differently. Choosing the wrong type, or the wrong combination, means you spend money without getting the full benefit. Here is a straightforward comparison of the three most common attic insulation options for Central Texas homes, with real costs and honest recommendations based on what we see in the field every day.
Side-by-Side Comparison
| Feature | Blown-In Fiberglass | Fiberglass Batt | Radiant Barrier |
|---|---|---|---|
| Best For | Attic floor upgrades | Walls, new construction | Roof rafter lining |
| How It Works | Slows conductive heat | Slows conductive heat | Reflects radiant heat |
| R-Value per Inch | R-2.2 to R-2.7 | R-3.0 to R-3.8 | N/A (reflective) |
| Typical Cost | $1,500 to $4,500 | $1.00 to $2.00/sq ft | $800 to $1,800 |
| Installation | Machine-blown, 3-6 hrs | Hand-cut and placed | Stapled to rafters |
| Fills Gaps? | Yes, excellent coverage | Only if cut precisely | Does not fill gaps |
| Attic Temp Reduction | Moderate | Moderate | 20 to 30 degrees |
| Lifespan | 20 to 30 years | 20 to 30 years | 25+ years |
Blown-In Fiberglass: The Go-To for Most Attic Upgrades
If your goal is to upgrade the insulation on your attic floor, blown-in fiberglass is the option we recommend most often. Here is why: it is machine-blown into the attic space, which means it fills around obstacles like wiring, pipes, ductwork, and framing members. It settles into an even layer that provides consistent thermal resistance across the entire attic floor.
For Central Texas homes (IECC Climate Zones 2 and 3), the Department of Energy recommends R-38 to R-60 in the attic. That translates to roughly 10 to 16 inches of blown-in fiberglass. Many homes in Temple, Killeen, and Waco still have only 3 to 6 inches of insulation from the original construction. Topping that up to R-38 or higher is usually the single most cost-effective energy improvement a homeowner can make.
Blown-In Fiberglass at a Glance
- Cost: $1,500 to $4,500 for a typical Central Texas home
- Installation time: 3 to 6 hours
- Can be added over existing insulation (if in good condition)
- Best choice for most attic floor upgrades
Fiberglass Batt: Best for Walls and New Construction
Fiberglass batt insulation comes in pre-cut panels designed to fit between standard wall studs and ceiling joists. It works well when the framing is exposed and the batts can be cut to fit tightly. That makes it ideal for new construction, remodels where walls are opened up, and wall insulation projects.
For existing attic floors, batts are generally not the first choice. They need to be laid flat between joists, and any gaps, compressions, or misalignments reduce performance. In an attic full of wiring, pipes, and ductwork, blown-in insulation provides more consistent coverage. However, if you are building a new home or adding on to an existing one, batts are an excellent wall insulation option at $1.00 to $2.00 per square foot.
Radiant Barrier: The Texas Heat Game-Changer
Radiant barrier is different from traditional insulation. Instead of slowing conductive heat transfer, it reflects radiant heat from the sun before it can warm the attic space. It is installed as a reflective foil material on the underside of the roof rafters, facing the attic.
In Central Texas, where roof surface temperatures can exceed 160 degrees in July and August, radiant barrier makes an enormous difference. Homes with radiant barrier typically see attic temperatures drop by 20 to 30 degrees compared to homes without it. That means your attic insulation works better, your AC runs less, and your upstairs rooms stay more comfortable.
Radiant barrier is not a replacement for attic insulation. It is a complement. The best-performing attics in Central Texas use both: blown-in insulation on the attic floor for conductive resistance, and radiant barrier on the rafters for radiant heat reflection. Together, they cover both types of heat transfer and deliver the most complete thermal protection available.
Our Recommendation for Temple, TX Homeowners
Based on the hundreds of homes we have assessed and insulated across Central Texas, here is what we recommend for most situations:
If your attic insulation is thin (under 10 inches)
Add blown-in fiberglass to bring it up to R-38 or R-60. This is the highest-impact, best-value upgrade for most homes. Cost: $1,500 to $4,500.
If your attic is extremely hot in summer
Add a radiant barrier alongside the insulation upgrade. The combination provides the best overall heat reduction. Total cost: $2,300 to $6,300.
If you feel drafts or have uneven room temperatures
Start with air sealing before adding insulation. Sealing the leaks first ensures the new insulation performs at full capacity. Add $500 to $1,500.
If you are not sure where to start
Schedule a thermal imaging inspection or energy audit. We will show you exactly where your home is losing energy and recommend the most impactful improvements in priority order.
Why Local Experience Matters
National insulation guides can give you general information, but they do not account for what makes Central Texas different. Our climate is hotter than most of the country. Our homes are built differently. The building codes, energy costs, and utility providers in Temple, Killeen, Georgetown, and Round Rock all affect which insulation strategy makes the most sense.
All Star Home Insulation works exclusively in Central Texas. We understand the local housing stock, the climate patterns, and what actually moves the needle on energy bills in this area. When we recommend an approach, it is based on what we have seen work in homes just like yours, not what a generic calculator says.
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Attic Insulation Questions
What is the best attic insulation for homes in Temple, Texas?
For most Temple, TX homes, blown-in fiberglass insulation is the best option for attic upgrades. It fills gaps evenly, provides consistent R-value across the attic floor, and can be installed over existing insulation. For maximum performance in Central Texas heat, pairing blown-in insulation with a radiant barrier on the roof rafters delivers the best results.
What R-value do I need for my attic in Central Texas?
The Department of Energy recommends R-38 to R-60 for attics in Central Texas (IECC Climate Zones 2 and 3). R-38 is equivalent to roughly 10 to 12 inches of blown-in fiberglass. R-60 requires about 16 inches. Many older homes in the Temple and Killeen areas have only 3 to 6 inches, which falls well below current standards.
How much does attic insulation cost in Temple, TX?
Attic insulation upgrades in Temple typically cost $1,500 to $4,500 for a standard home, depending on attic size and the R-value target. Adding a radiant barrier costs an additional $800 to $1,800. Air sealing, which is recommended alongside insulation, adds $500 to $1,500. All Star Home Insulation provides free in-home estimates with transparent pricing.
Is blown-in insulation better than fiberglass batts for an attic?
For attic floor upgrades in existing homes, blown-in insulation is generally the better choice. It fills irregular spaces, covers around obstacles like wiring and pipes, and provides more consistent coverage than batts. Fiberglass batts are better suited for walls, new construction, and open framing cavities where they can be cut to fit precisely.
Do I need a radiant barrier if I already have attic insulation?
A radiant barrier and attic insulation work in different ways and complement each other. Insulation slows conductive heat transfer through the attic floor. A radiant barrier reflects radiant heat from the sun before it warms the attic space. Together, they can reduce attic temperatures by 20 to 30 degrees and deliver greater energy savings than either one alone.
Can new insulation be installed over old insulation in my attic?
In most cases, yes. If the existing insulation is dry, clean, and not compressed or contaminated, blown-in insulation can be added directly on top. If the old material is damaged, wet, or infested, it should be removed first. All Star Home Insulation inspects existing insulation during every free assessment and recommends the right approach for your situation.
Not Sure Which Insulation Is Right for Your Home?
Schedule a free in-home assessment. We measure your attic, check your existing insulation, and recommend the best approach for your home and budget.